Prosthetic valves are divided into two categories: mechanical and biological valves. The type of prosthetic valve used in valve replacement surgery should be analyzed on a case-by-case basis. The patient’s age, occupation, physical and mental status, the patient’s opinion on valve selection, the patient’s myocardial condition, and the patient’s ability to receive long-term anticoagulation therapy should be considered. Biologic valves have good hemodynamics, low thromboembolic rates, and may not require long-term anticoagulation in some patients; however, the greatest disadvantage of biologic valves is their poor durability, which typically ranges from about 15 to 20 years. Longer periods of time may cause decay and require secondary surgery. Mechanical valves are more durable and generally last a lifetime. However, as things stand today, mechanical valves made of whatever material are implanted in the heart require lifelong anticoagulation therapy for the patient. Biologic valves are mainly used in patients: 1, women of childbearing age who wish to become pregnant; 2, as far as age is concerned, biologic valves should be preferred in patients over 65 years of age, and mechanical valves are preferred in patients under 50 years of age, so as to ensure their durability and to avoid calcification of biologic valves in adolescents; 3, patients with bleeding qualities and bleeding disorders and other reasons that prevent them from receiving long-term anticoagulation therapy; depending on the patient’s economic conditions and health care conditions, a biologic valve is appropriate for those who are unable to undergo anticoagulation in rural areas. 4, the tricuspid valve is the site with the highest rate of thromboembolism among all valve replacement emboli, which may be related to the low pressure and slow blood flow in this site, so it is ideal to use biological valves for valve replacement in the tricuspid site.